Questions about: authentication

That error is caused by having a software repository, but not the digital signing keys for it. The keys are used to verify the integrity of packages, and that they really come from correct source. (Confusingly, you get the warning message regardless
I’m experimenting with VPNs, so I wanted to install pptpd. john@desktop:~$ sudo apt-get install pptpd [sudo] password for john: The following extra packages will be installed: bcrelay The following NEW packages will be installed: bcrelay pptpd 0 upgr
Setting up passwordless SSH logins is a great way to speed up connections to regularly accessed remote Macs and unix boxes. Because OS X doesn’t include the ssh-copy-id command, you will have to use cat or scp to copy over your ssh key. This is how t